The initial condition as given in [1]} for shock entropy
wave interaction problem is
\(U(x,0)={\left\lbrace \begin{array}{ll}(3.857143,2.629369,10.33333), & \text{ if }-5\le x<-4,\\(1+\epsilon sin(kx),0.000,1.000), & \text{ if }-4\le x\le 5.\end{array}\right.}\) 
